StreetLight/Assets/StreetLight/Serialization/ColorConverter.cs

using Newtonsoft.Json;
using System;
using UnityEngine;

namespace Assets.StreetLight.Serialization
{
    public class ColorConverter : JsonConverter
    {
        public override bool CanConvert(Type objectType)
        {
            return objectType == typeof(Color);
        }

        public override object ReadJson(JsonReader reader, Type objectType, object existingValue, JsonSerializer serializer)
        {
            return new Color();
        }

        public override void WriteJson(JsonWriter writer, object value, JsonSerializer serializer)
        {
            var color = (Color)value;
            writer.WriteValue($"({color.a}|{color.r}|{color.g}|{color.b})");
        }
    }
}